The Science of Wound Care for Dogs and Cats: Cleaning, Skin Repair and EXOCARE
TPC Learn / Daily Skin Care / Ingredients & Science
By Treat Protocol Co. · Updated September 2026 · 7-minute read
For dogs and cats, a wound is more than a gap in the skin. It is a living repair site. Before thinking about a recovery gel, the first question is whether the area is ready for one: has the injury been assessed, has contamination been addressed, and is the treatment suitable for that wound?
EXOCARE has no antimicrobial properties. It belongs after appropriate cleaning, not in place of it. Here is the science behind that distinction, how skin rebuilds itself, and what exosome research can—and cannot—tell us about a finished care gel.
First, decide whether this is a home-care situation
Seek urgent veterinary attention for heavy or persistent bleeding, a deep or gaping wound, a bite or puncture, exposed tissue, or an animal that seems weak or very unwell. Increasing swelling, pain, discharge or an unpleasant smell also needs prompt veterinary assessment. If you are unsure how serious an injury is, contact your veterinarian before applying products.
For bleeding, apply steady pressure with clean gauze or a clean cloth while arranging help. Do not attempt to glue, stitch or tightly close a wound at home. Veterinary treatment may need to leave an infected wound open for drainage. See VCA's guidance on open wounds.
A special warning for cats: tiny bite marks can hide deeper injury
A puncture after a fight can seal over while infection develops underneath. A small surface mark is not a reason to wait if your cat is painful, swollen, limping or unwell. Do not squeeze it or seal it with gel. VCA's feline fight-wound guide explains this risk.
Normal feline grooming does not make wound licking beneficial. Use the protection and aftercare recommended by your veterinarian; VCA's cat wound-care guidance provides a species-specific companion to the dog guidance above.
Cleaning and disinfection do different jobs
Cleaning removes material. Gentle wound irrigation washes away debris and some microbes. Plain 0.9% saline is tissue-friendly, but it is not an antiseptic.
Antisepsis targets microbes on living tissue. What owners often call “disinfecting a wound” requires a wound-appropriate product, not a household surface disinfectant. Your veterinarian decides whether an antiseptic is needed and specifies the formulation, dilution and frequency.
Stronger is not automatically better. Concentrated chlorhexidine, detergent-containing surgical scrubs and hydrogen peroxide can harm healing tissue. Do not improvise a dilution or scrub a wound aggressively. These principles are explained in the Merck Veterinary Manual's wound-management guidance.
Cleaning and antimicrobial treatment are complementary tasks, not interchangeable ones. This diagram is a simplified sequence, not instructions for treating every wound.
Why a clean-looking surface is not the whole story
Microbes can form organised communities called biofilms. A useful experimental finding comes from a study of infected pig burn wounds: the surface could close while the rebuilt skin barrier remained impaired. The study did not test EXOCARE or routine pet scratches, but it illustrates why appearance alone cannot confirm healthy repair. Read Roy and colleagues' biofilm study.
The practical lesson is not to keep adding disinfectant. It is to have persistent or deteriorating wounds reassessed rather than covering them with another layer of gel.
How skin heals: four overlapping steps
A clot limits bleeding; immune cells tackle microbes and damage. Fibroblasts build a framework, blood vessels develop and surface cells migrate across the repair bed. Collagen then reorganises. These activities overlap, and newly closed skin is not yet full-strength.
The diagram simplifies the Merck Veterinary Manual's explanation of wound healing.
What exosomes have to do with repair
Cells communicate partly through tiny membrane-bound particles called extracellular vesicles, or EVs. Exosomes are one subtype. Think of them as molecular parcels rather than replacement cells: their cargo can influence how a receiving cell behaves. Scientists distinguish carefully between EV types; the international MISEV2023 recommendations caution against calling every small vesicle an exosome.
Why is that interesting for skin? In a 2015 study, researchers tested exosomes from human induced-pluripotent-stem-cell-derived mesenchymal stromal cells. Laboratory experiments found effects on fibroblast movement, growth and repair-related protein production, and on cells involved in blood-vessel formation. In rat wounds, the researchers reported improved skin resurfacing and other repair measures.
This was a specialised experimental preparation with a treatment protocol that included injections around wounds—not a trial of EXOCARE applied to pets. The results help explain the interest in cell-derived signals, but they do not establish a healing-time reduction for a commercial gel. See Zhang and colleagues' original study.
For a deeper discussion of laboratory findings versus product evidence, read Exosomes and Wound Healing: What Dog and Cat Owners Should Know.
Where EXOCARE fits—and what “adhesion” means
EXOCARE All-in-One Oral & Skin Care Gel contains canine umbilical-cord mesenchymal-stromal-cell conditioned medium. It is cell-free: there are no live stem cells in the gel. Conditioned medium is not the same thing as a purified exosome preparation. Our Inside EXOCARE: Cell-Free Conditioned Medium and What It Means for Dogs and Cats explains the distinction.
The manufacturer describes EXOCARE as sterile and suitable for most companion animals. Its intended care role is to support the skin's natural recovery process. Sterile does not mean antimicrobial: the product does not disinfect the surface it touches, and an opened tube must not be assumed to remain sterile regardless of handling.
It also helps to separate three ideas:
- Gel adherence: a formulation staying in contact with the application area.
- Cell adhesion: cells attaching to their surroundings during normal tissue organisation.
- Wound closure: the biological and, sometimes, surgical process of closing a defect.
A gel that adheres well is not necessarily a tissue adhesive and does not prove faster closure. We do not have a product-specific controlled report establishing that EXOCARE accelerates wound closure, so we do not make that promise.
If your veterinarian includes EXOCARE in a wound-care plan, apply a small amount to the appropriately cleaned area as directed. Do not use it to seal a deep or infected wound or replace prescribed infection treatment. Advice for routine surface care is available in How to Use EXOCARE for Dogs and Cats: Mouth, Skin, Paws and Outer Ear Care; an open wound needs its own plan.
The evidence limit applies to both species. Findings from laboratory cells, rats or pigs do not establish EXOCARE's wound-healing performance in dogs or cats. Nor should a treatment plan for one species be copied to the other.
Can HX-01 or HX-03 be part of that plan?
HX-01 Skin Support Mist and HX-03 Skin Calming Pads have different formats and directions. A product intended for routine skin cleansing is not automatically suitable for every open wound, ear canal or delicate tissue.
For HX-03, the fact that it contains 0.05% chlorhexidine does not, by itself, establish that the complete wipe formulation is suitable for wound irrigation. Follow the actual product label and your veterinarian's advice. Do not mix products or assume a validated HX-to-EXOCARE contact time or compatibility protocol exists.
For the distinction between everyday cleansing and care-gel application, read Clean First: Where EXOCARE, HX-01 and HX-03 Fit in Dog and Cat Skin Care. For a wound, ask your veterinarian exactly what to clean with, whether anything needs rinsing off, and when the next product should be applied.
Protect the progress, not just the surface
Follow the cleaning and dressing schedule you are given, prevent licking or chewing, and use prescribed medication as directed. An Elizabethan collar may be needed. Have your clinic demonstrate any bandage changes rather than improvising a tight wrap. VCA's aftercare guidance explains these practical priorities.
Ask for a review date and clear signs that should trigger an earlier call. A daily photograph in similar light can help you describe changes, but it cannot diagnose infection or replace examination.
The takeaway
Good wound care starts by creating suitable conditions for living tissue to repair. Cleaning, infection management and recovery support have different roles. Exosome research offers an interesting biological rationale for studying cell-derived signals; it is not a shortcut around those basics.
Explore the EXOCARE journal, browse more Daily Skin Care and Ingredients & Science articles, or return to TPC Learn.
New guides to explore
- Cat Bites and Abscesses: Why a Tiny Wound Can Be Serious
- Your Dog and Cat First-Aid Kit: What to Keep—and What to Leave Out
General education, not a diagnosis or an individual treatment plan. Treat Protocol Co. imports and distributes EXOCARE and sells the HX products discussed. Product characteristics stated here are based on manufacturer information supplied to TPC; the cited research did not test the finished EXOCARE gel. Cover photograph: AI-generated editorial artwork. Diagrams: original simplified educational illustrations, not clinical images or treatment instructions.